Molding-machine.



O. EISELE.

MOLDING MACHINE.

7 APPLICATION FILED JAN. 27, I914.

l 1 Q4, 1 80. Patented June 22, 1915.

6 a k a j #7756556; Jive/lia y I 07hr fi'sak,

THE NORRIS PETERS CO., PHOTQLITHQ. WASHINGTDN, D. c

MOLDING-MACHINE.

intense.

Specification of Letters Eatent.

Patented June 22, 131 15.

Application filed January 27, 1914. Serial No. 814,764.

To all whom it may concern Be it known that I, OTHMAR Ersnrn, subject of the Emperor of Austria-Hungary, residing at Vienna, Austria-Hungary, have invented certain new and useful Improvements in Molding-Machines, of which the following is a specification.

This invention relates to an apparatus for compressing the sand in the boxes or flasks of molding machines. This apparatus enables the sand to be compressed by successive applications of pressure and therefore a suflicient compression of the molding sand to be obtained even in large'boxes or flasks by means of a simple hand-press. For this purpose, it has been suggested to use a multipart pressing piece, the several parts of which can be pressed into the sand to different depths for the time being.

In View of the above, the invention consists in the use of a multipart plate consisting of frames, rings or blocks; this plate is laid loosely on the sand to be compressed in the box or flask and the several parts of the'said plate are pressed into the sand independently of each other in any desired order and to any, desired extent, and remain continuously on the sand until the compression of the latter is complete. By this means, loosening of the already compressed parts of the sand during compression of other parts is also prevented.

The invention consists furthermore in that, on the press-cross-beam of the molding machine (which cross beam is capable of being moved or oscillated in a known manner), there are adjustably mounted one or more transverse bars which before each stroke of the press can be placed opposite to any other part of the mold and preferably serve for the pressing in of the several parts of the above mentioned multipart plate placed loosely on the molding sand, in which arrangement it may be noted that the said transverse bars themselves or blocks secured thereto can also be used for compressing the molding sand.

In the drawing, one constructural form of the molding machine is shown, wherein the compression of the molding sand is effected by the aid of a plate divided into frame-shaped parts and the several parts of this plate are pressed down by means of adjustable transverse bars mounted on the press-cross-beam. In this drawing Figure 1 shows the pressing device in section, in which View, of the molding machine only the table and the standards serving for the actuation of press-cross-b'eam are shown. Fig. 2 is a plan of the pressing device. Fig. 3 is a plan view, and Fig. 4: is a side elevation of the modified machine showing a slightly modified construction.

a indicates the turnover top table of the molding machine, this table being capable of being raised and lowered in a known manner.

7) is the box or flask, c the filling frame placed on the latter, and (Z the molding sand. On the molding sand with which the filling frame 0 is filled there lies loosely a multipart plate, the several parts 6, e 6 of which have the form of frames, rings or the like. On the press-crossbeam h, which can be moved up and down by means of the hand lever f and of cams or eccentrics arranged in the standards 9, transverse bars 70 are adjustably arranged in a suitable manner. By

correspondingly adjusting the transverse bars, first the part c, then the part c and afterward the part c of the press-block can be firmly pressed into the sand and the latter thereby compressed to a suficient degree. Obviously also the middle parts of the molding sand can be compressed first. In cases where the transverse bars is (independently of whether they are themselves used for compressing the sand or whether they effect the compression by means of a divided underplate as in the example of construction shown), are too long to pass into the box or flask or to take with them any part of the underplate or are too short to extend over the whole length or breadth of the box or flask, blocks 70 of suitable length can be arranged beneath the transverse bars, as shown in Figs. 3 and 4. The divided plate can be adapted to the size of the box or flask for the time being by interchanging in dividual parts or adding further pieces.

Claim.

1. In a molding machine, the combination with a flask adapted to contain a body of sand, and a plurality of independently movable concentric frames adapted to compress different portions of the sand in the flask.

2. In a molding machine, the combination with a flask adapted to contain a body of sand, a plurality of concentric independently movable frames adapted to bear upon different portions of the sand in the flask, and

vlie upon diflerent portions of the sand in the flask, a press including a cross member;

and pressure devices adjustable to different 'DBSSBS.

positions on said cross member to exert pres- 10 sure upon the different frames.

In testimony whereof I have hereunto set my hand in presence of tWo subscribing Wit- 7 OTHMAR EISELE;

Witnesses:

JOSEF RUBARCH, AUGUST FUGGER.

Copies of this patent may be obtained for five cents each; by addressing the Commissioner of Patents.

. 7 Washington, D. G. 

